This is a new "water heater" base plate for a Holley 350 or 500 two barrel. These plates originally came on Ford Mustangs, but can be used with any Holley 350/500 carburetor on any engine. The plate is made from aluminum, so it was not rusty, however the hose fittings were (past tense) steel, and badly rusted, sooooo old slicky here cut them off, reamed out the holes, and installed new brass hose barbs- - -easy deal.